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The ultraviolet spectra of the O and B stars in the young galactic cluster NGC 6530The UV spectra between 1200 and 3000 A of stars in the young galactic cluster NGC 6530 and the surrounding association are studied. From the UBV colors and empirical as well as theoretical calibrations, the T(eff) and L for those stars which follow a sequence in the H-R diagram corresponding to the main sequence are determined. From a comparison with theoretical evolutionary tracks, the age of the cluster is estimated to be 5 + or - 2 x 10 to the 6th yr, with a very small scatter for the different stars. The UV extinction is determined for the stars from a comparison of theoretical model energy distributions for the stellar T(eff)s and the observed energy distributions. The stellar wind lines are studied, and strong stellar winds are found for bolometric magnetidues less than -8.
Document ID
19850041361
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Boehm-Vitense, E.
(Washington Univ. Seattle, WA, United States)
Hodge, P.
(Washington Univ. Seattle, WA, United States)
Boggs, D.
(Washington, University Seattle, WA, United States)
Date Acquired
August 12, 2013
Publication Date
December 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 287
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A23512
Funding Number(s)
CONTRACT_GRANT: NAG5-207
Distribution Limits
Public
Copyright
Other

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